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Stone material, in particular for timepiece movement, and method for producing same

A technology of stone and timepieces, applied in the direction of manufacturing tools, mechanically driven clocks, instruments, etc., can solve the problems of not being accurate enough, not allowing to obtain all desired shapes, and not being able to functionalize the stone surface

Pending Publication Date: 2022-04-12
COMADUR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the techniques for working with these stones (whether they are monocrystalline or polycrystalline) do not allow to obtain all the desired shapes
In fact, traditional machining is not precise enough for some shapes
In particular, stone surfaces cannot be functionalized beyond simple blank holes or recesses, which should then be given their final shape

Method used

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  • Stone material, in particular for timepiece movement, and method for producing same
  • Stone material, in particular for timepiece movement, and method for producing same
  • Stone material, in particular for timepiece movement, and method for producing same

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Embodiment Construction

[0042] As mentioned above, the invention relates to a method for manufacturing a stone capable of forming a guide element of a timepiece. The stone, for example, is intended to be in contact with the pivot in order to enable rotational movement of the pivot with minimum friction. It will thus be understood that the invention allows in particular to produce a stone capable of forming all or part of the bearing of a rotatably mounted shaft.

[0043] The stone material is formed by a mineral body which may be of the monocrystalline type in the first embodiment or of the polycrystalline type in the second embodiment. For single crystals, the body includes, for example, Al2O3, and for polycrystalline, the body includes, for example, polyruby of the Al2O3Cr type or zirconia of the ZrO2 type. Depending on the embodiment, the method of obtaining the mineral body is different.

[0044] exist figure 1 In the shown first embodiment of method 1 , method 1 comprises a first step 2 of pr...

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Abstract

The invention relates to a method for producing a stone material (30) from a mineral body of the monocrystalline or polycrystalline type, in particular for a timepiece. The method comprises an ablation step in which the body is subjected to material ablation by scanning over at least one face of the body with ultra-short pulsed laser radiation, the duration of which is less than 100 picoseconds and the beam of which is guided by a precession system having at least three axes, the precession system is configured to at least partially counteract a laser taper angle due to focusing of the laser. The invention also relates to a mineral stone (30) of the single crystal type or polycrystalline type, in particular for a timepiece movement, said stone (30) being obtainable by this method. The stone material comprises, in particular, a face (25) provided with a peripheral edge (27), in particular for laterally clamping an end stone (35) in a bearing.

Description

technical field [0001] The invention relates to a method for the manufacture of stone, in particular for timepiece movements. [0002] The invention also relates to a stone provided with a rim, in particular a bearing. [0003] The invention also relates to a timepiece movement comprising such a stone. Background technique [0004] In the prior art of horology, stones of the ruby ​​or sapphire type are used in particular to form end stones or guide elements known as coussinets in timepieces. These end stones and guide elements are intended to be in contact with the pivot in order to enable rotational movement of the pivot with minimum friction. They thus form all or part of, for example, the bearing of a rotatably mounted shaft. The guide element usually includes a through hole in order to insert the pivot shaft therein. [0005] In principle, synthetic stone is used for timepiece movements. In particular, methods of the Verneuil type are known for producing stones of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/0622B23K26/382G04B31/06G04D3/00
CPCG04B31/06G04D3/0071B23K26/382B23K26/0624B23K2103/50G04B31/008
Inventor B·贝苏缇S·雷特罗维B·吉利P·维勒
Owner COMADUR